83 lines
2.1 KiB
Rust
83 lines
2.1 KiB
Rust
use syntax::{ast, AstNode, T};
|
|
|
|
use crate::{AssistContext, AssistId, AssistKind, Assists};
|
|
|
|
// Assist: split_import
|
|
//
|
|
// Wraps the tail of import into braces.
|
|
//
|
|
// ```
|
|
// use std::$0collections::HashMap;
|
|
// ```
|
|
// ->
|
|
// ```
|
|
// use std::{collections::HashMap};
|
|
// ```
|
|
pub(crate) fn split_import(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
|
|
let colon_colon = ctx.find_token_syntax_at_offset(T![::])?;
|
|
let path = ast::Path::cast(colon_colon.parent()?)?.qualifier()?;
|
|
|
|
let use_tree = path.top_path().syntax().ancestors().find_map(ast::UseTree::cast)?;
|
|
|
|
let has_errors = use_tree
|
|
.syntax()
|
|
.descendants_with_tokens()
|
|
.any(|it| it.kind() == syntax::SyntaxKind::ERROR);
|
|
let last_segment = use_tree.path().and_then(|it| it.segment());
|
|
if has_errors || last_segment.is_none() {
|
|
return None;
|
|
}
|
|
|
|
let target = colon_colon.text_range();
|
|
acc.add(AssistId("split_import", AssistKind::RefactorRewrite), "Split import", target, |edit| {
|
|
let use_tree = edit.make_mut(use_tree.clone());
|
|
let path = edit.make_mut(path);
|
|
use_tree.split_prefix(&path);
|
|
})
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use crate::tests::{check_assist, check_assist_not_applicable, check_assist_target};
|
|
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn test_split_import() {
|
|
check_assist(
|
|
split_import,
|
|
"use crate::$0db::RootDatabase;",
|
|
"use crate::{db::RootDatabase};",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn split_import_works_with_trees() {
|
|
check_assist(
|
|
split_import,
|
|
"use crate:$0:db::{RootDatabase, FileSymbol}",
|
|
"use crate::{db::{RootDatabase, FileSymbol}}",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn split_import_target() {
|
|
check_assist_target(split_import, "use crate::$0db::{RootDatabase, FileSymbol}", "::");
|
|
}
|
|
|
|
#[test]
|
|
fn issue4044() {
|
|
check_assist_not_applicable(split_import, "use crate::$0:::self;")
|
|
}
|
|
|
|
#[test]
|
|
fn test_empty_use() {
|
|
check_assist_not_applicable(
|
|
split_import,
|
|
r"
|
|
use std::$0
|
|
fn main() {}",
|
|
);
|
|
}
|
|
}
|